<%@page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page contentType="image/jpeg" import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*"%><%!
//给定范围获得随机颜色
  Color getRandColor(Random random, int fc, int bc) {
    if (fc > 255) fc = 255;
    if (bc > 255) bc = 255;
    int r = fc + random.nextInt(bc - fc);
    int g = fc + random.nextInt(bc - fc);
    int b = fc + random.nextInt(bc - fc);
    return new Color(r, g, b);
  }
%><%
  //设置页面不缓存
  response.setHeader("Pragma", "No-cache");
  response.setHeader("Cache-Control", "no-cache");
  response.setDateHeader("Expires", 0);
  // 锟斤拷锟斤拷图片锟侥筹拷锟斤拷
  int width = 176, height = 30;
  //锟斤拷锟矫憋拷选锟斤拷锟街ｏ拷锟睫筹拷一些锟斤拷锟脚的猴拷锟斤拷 

  String base = "u7684u4e00u4e86u662fu6211u4e0du5728u4ebau4eecu6709u6765u4ed6u8fd9u4e0au7740u4e2au5730u5230u5927u91ccu8bf4u5c31u53bbu5b50u5f97u4e5fu548cu90a3u8981u4e0bu770bu5929u65f6u8fc7u51fau5c0fu4e48u8d77u4f60u90fdu628au597du8fd8u591au6ca1u4e3au53c8u53efu5bb6u5b66u53eau4ee5u4e3bu4f1au6837u5e74u60f3u751fu540cu8001u4e2du5341u4eceu81eau9762u524du5934u9053u5b83u540eu7136u8d70u5f88u50cfu89c1u4e24u7528u5979u56fdu52a8u8fdbu6210u56deu4ec0u8fb9u4f5cu5bf9u5f00u800cu5df1u4e9bu73b0u5c71u6c11u5019u7ecfu53d1u5de5u5411u4e8bu547du7ed9u957fu6c34u51e0u4e49u4e09u58f0u4e8eu9ad8u624bu77e5u7406u773cu5fd7u70b9u5fc3u6218u4e8cu95eeu4f46u8eabu65b9u5b9eu5403u505au53ebu5f53u4f4fu542cu9769u6253u5462u771fu5168u624du56dbu5df2u6240u654cu4e4bu6700u5149u4ea7u60c5u8defu5206u603bu6761u767du8bddu4e1cu5e2du6b21u4eb2u5982u88abu82b1u53e3u653eu513fu5e38u6c14u4e94u7b2cu4f7fu5199u519bu5427u6587u8fd0u518du679cu600eu5b9au8bb8u5febu660eu884cu56e0u522bu98deu5916u6811u7269u6d3bu90e8u95e8u65e0u5f80u8239u671bu65b0u5e26u961fu5148u529bu5b8cu5374u7ad9u4ee3u5458u673au66f4u4e5du60a8u6bcfu98ceu7ea7u8ddfu7b11u554au5b69u4e07u5c11u76f4u610fu591cu6bd4u9636u8fdeu8f66u91cdu4fbfu6597u9a6cu54eau5316u592au6307u53d8u793eu4f3cu58ebu8005u5e72u77f3u6ee1u65e5u51b3u767eu539fu62ffu7fa4u7a76u5404u516du672cu601du89e3u7acbu6cb3u6751u516bu96beu65e9u8bbau5417u6839u5171u8ba9u76f8u7814u4ecau5176u4e66u5750u63a5u5e94u5173u4fe1u89c9u6b65u53cdu5904u8bb0u5c06u5343u627eu4e89u9886u6216u5e08u7ed3u5757u8dd1u8c01u8349u8d8au5b57u52a0u811au7d27u7231u7b49u4e60u9635u6015u6708u9752u534au706bu6cd5u9898u5efau8d76u4f4du5531u6d77u4e03u5973u4efbu4ef6u611fu51c6u5f20u56e2u5c4bu79bbu8272u8138u7247u79d1u5012u775bu5229u4e16u521au4e14u7531u9001u5207u661fu5bfcu665au8868u591fu6574u8ba4u54cdu96eau6d41u672au573au8be5u5e76u5e95u6df1u523bu5e73u4f1fu5fd9u63d0u786eu8fd1u4eaeu8f7bu8bb2u519cu53e4u9ed1u544au754cu62c9u540du5440u571fu6e05u9633u7167u529eu53f2u6539u5386u8f6cu753bu9020u5634u6b64u6cbbu5317u5fc5u670du96e8u7a7fu5185u8bc6u9a8cu4f20u4e1au83dcu722cu7761u5174u5f62u91cfu54b1u89c2u82e6u4f53u4f17u901au51b2u5408u7834u53cbu5ea6u672fu996du516cu65c1u623fu6781u5357u67aau8bfbu6c99u5c81u7ebfu91ceu575au7a7au6536u7b97u81f3u653fu57ceu52b3u843du94b1u7279u56f4u5f1fu80dcu6559u70edu5c55u5305u6b4cu7c7bu6e10u5f3au6570u4e61u547cu6027u97f3u7b54u54e5u9645u65e7u795eu5ea7u7ae0u5e2eu5566u53d7u7cfbu4ee4u8df3u975eu4f55u725bu53d6u5165u5cb8u6562u6389u5ffdu79cdu88c5u9876u6025u6797u505cu606fu53e5u533au8863u822cu62a5u53f6u538bu6162u53d4u80ccu7ec6"; 
  //锟斤拷选锟斤拷锟街的筹拷锟斤拷
  int length = base.length();
  //锟斤拷锟斤拷锟节达拷图锟斤拷
  BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
  // 锟斤拷取图锟斤拷锟斤拷锟斤拷锟斤拷
  Graphics g = image.getGraphics();
  //锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷实锟斤拷
  Random random = new Random();
  // 锟借定图锟今背撅拷色(锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷偏锟斤拷)
  g.setColor(getRandColor(random, 200, 250));
  g.fillRect(0, 0, width, height);
  //锟斤拷选锟斤拷锟斤拷
  String[] fontTypes = {
      "u5b8bu4f53", "u65b0u5b8bu4f53", "u9ed1u4f53", "u6977u4f53", "u96b6u4e66"};
  int fontTypesLength = fontTypes.length;
  //锟斤拷图片锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�
  g.setColor(getRandColor(random, 160, 200));
  g.setFont(new Font(null, Font.PLAIN, 14));
  for (int i = 0; i < 6; i++) {
    g.drawString("*********************************************", 0, 5 * (i + 2));
  } 
  //取锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街わ拷锟�(6锟斤拷锟斤拷锟斤拷)
  //锟斤拷锟斤拷锟斤拷锟缴的猴拷锟斤拷锟街凤拷锟斤拷
  String sRand = "";
  for (int i = 0; i < 6; i++) {
    int start = random.nextInt(length);
    String rand = base.substring(start, start + 1);
    sRand += rand;
  //锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟缴�
    g.setColor(getRandColor(random, 10, 150));
  //锟斤拷锟斤拷锟斤拷锟斤拷
    g.setFont(new Font(fontTypes[random.nextInt(fontTypesLength)], Font.BOLD, 18 + random.nextInt(6)));
  //锟斤拷锟剿猴拷锟街伙拷锟斤拷图片锟斤拷
    g.drawString(rand, 24 * i + 10 + random.nextInt(8), 24);
  }
  //锟斤拷锟斤拷证锟斤拷锟斤拷锟絪ession
  session.setAttribute("rand", sRand);
  g.dispose();
  //锟斤拷锟酵硷拷锟揭筹拷锟�
  ImageIO.write(image, "JPEG", response.getOutputStream());
  out.clear();
  out = pageContext.pushBody();
%>